I’m not exactly sure where to place Psylocke when it comes to telepathic skill level though.

I dont read Excalibur so i dont know if CC has been doing anything crazy with Sage but she is not a powerful telepath. Actually she's on the lower end or should be. As of X-treme X-men, she shouldnt even have access her telepathy, but then again, I havent been keeping up with whats been going on with her

Psylocke herself, never seemed that powerful either, but she definetly had more skill and power than Sage.